Three-dimensional effects on turbulent shear layers
Abstract
This project is a combined computational and experimental investigation into the physics ofthree-dimensional turbulent shear layers., Turbulent shear layers are ubiquitous in Navalapplications and are one of the canonical building blocks of turbulence. The vast maj,ority ofstudies into shear layers has been focused on the most canonical case with zero mean cross flow.This project instead focuses, on the three-dimensional case with non-zero cross flow, in which themean streamlines experience spanwise turning. The main motivati,on for the study is thejuxtaposition between the fact that most realistic shear layers experience three-dimensional effectand the la,ck of comprehensive studies of three-dimensional shear layers in the literature. At themost fundamental level, the project aims to i,nvestigate and describe how a shear layer is affectedby three-dimensionality, quantify how large the effect is, identify the control,ling parameters, andultimately build a theoretical predictive model.The research methodology is a combined computational and experim,ental investigation.Experiments of a canonical three-dimensional turbulent shear layer will be carried out in a windtunnel at Cornel,l University. The experiment will be designed to have well-defined boundaryconditions that can be replicated in computations or diff,erent experiments. In parallel, highfidelityturbulence simulations will be used to produce highly idealized three-dimensional shearl,ayers. The computations will be used to perform numerical experiments in which the nature andstructure of the incoming turbulence an,d the degree of mean flow three-dimensionality aresystematically varied. The experiments will cover a much larger range of Reynolds,numbers andwill be used to assess that effect. The project will support two graduate students that will workon this project for thei,r PhD theses.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Dec 10, 2021
- Source ID
- N000142212038
Entities
People
- Johan Larsson
Organizations
- Office of Naval Research
- United States Navy
- University of Maryland